2006PASP..118..805P

Query : 2006PASP..118..805P

2006PASP..118..805P - Publ. Astron. Soc. Pac., 118, 805-808 (2006/June-0)

V725 Sagittarii: from population II cepheid to red semiregular variable.

PERCY J.R., MOLAK A., LUND H., OVERBEEK D., WEHLAU A.F. and WILLIAMS P.F.

Abstract (from CDS):

V725 Sgr is a unique pulsating variable star, first recognized by H. Swope, which increased its period from 12 to 21 days between 1926 and 1935. It was then neglected for three decades. We have used visual and photoelectric photometry of V725 Sgr from 1985 to 2004 to study its recent variability, using light-curve, Fourier, least-squares, and self-correlation analyses. Whereas the period was 12 days in 1926, it is now about 90 days. The range is typically a magnitude, in V. Its spectrum and variability, which earlier were those of a Cepheid, are now those of a red semiregular variable. The star's behavior is consistent with a thermal flash and blue loop in the H-R diagram, from the asymptotic giant branch to the Cepheid instability strip and back again.

Abstract Copyright: ∼

Journal keyword(s): Stars: Evolution - Stars: AGB and Post-AGB - Stars: Variables: Cepheids - Stars: Variables: Other - Stars: Population II

Simbad objects: 1

goto Full paper

goto View the references in ADS

Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* V725 Sgr LP* 18 11 59.4391917456 -36 06 40.335553692           ~ 16 0

Query : 2006PASP..118..805P

Basic data :
V* V725 Sgr -- Long-Period Variable
Other object types: otypes_help 		V* (AN,V*,...), cC* (2018yCat), LP* (2022yCat), * (Gaia), NIR (2MASS)
ICRS coord. (ep=J2000) : 		18 11 59.4391917456 -36 06 40.335553692 (Optical) [ 0.0259 0.0224 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		18 08 36.9517618145 -36 07 25.135000135 [ 0.0259 0.0224 90 ]
Gal coord. (ep=J2000) : 		356.4948308585361 -08.3715218089373 [ 0.0259 0.0224 90 ]
Proper motions mas/yr : 		-1.231 -4.341 [0.031 0.023 90] A 2020yCat.1350....0G
Parallaxes (mas): 		0.1615 [0.0328] A 2020yCat.1350....0G
Fluxes (4) :
G 11.795985 [0.021609] C 2020yCat.1350....0G
J 9.792 [0.030] C 2003yCat.2246....0C
H 9.121 [0.033] C 2003yCat.2246....0C
K 8.923 [0.029] C 2003yCat.2246....0C
SIMBAD within arcmin
Overlay Simbad points in this preview
Back
All CDSPortal (CDSPortal)
Send to sendBySAMP sendBySAMP
sedIcon
within arcsec sed-help-icon

Identifiers (8) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

SV* HV 7642 2MASS J18115943-3606402 V* V725 Sgr Gaia DR3 4038015379997952512
AN 419.1937 TIC 332190173 AAVSO 1805-36 Gaia DR2 4038015379997952512

References (16 between 1850 and 2026) (Total 16)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
Follow new references on this object
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

Collections of Measurements Description of Measurements

Var : 4    Plx : 2    PM : 2   

   

External archives :

Link by name to the catalogue in VizieR :

2MASS J18115943-3606402 V* V725 Sgr Gaia DR3 4038015379997952512 Gaia DR2 4038015379997952512

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 2006PASP..118..805P and select 'bookmark this link' or equivalent in the popup menu